following isis very, very closely on social media. a big fan of them. somebody that was angry at australian airstrikes. australia has flown over. this appears to be retaliation for australia's involvement in the coalition for going after isis. >> is it your sense that you have been involved in these kinds of negotiations, the longer it goes, 16 hours, at some point the hostage-taker is going to get tired, is going to get hungry, more desperate or the opposite, may simply give up. what usually happens in a situation like this? >> in a situation like this, we believe that the longer it takes, the better chances you have of the successful negotiation. why, because as you just said, he may get hungry and he may want food. keep in mind, when they want something, everything is a negotiation. whether it's a match to light a